////ESTA FUNCION LLAMA RENDER

function reccomendations() {
    var class_div = "widgetviral";

    var widgets = document.getElementsByClassName(class_div);

    for (i = 0; i < 4; i++) {


        order = widgets[i].getAttribute("data-order");
        count = widgets[i].getAttribute("data-count");
        nsfw = widgets[i].getAttribute("data-nsfw");
        div_actual = widgets[i];



        var premium = document.createElement("h3");
        premium.className += " wid_tit";
        premium.innerHTML = "Recommend Content";



        var ul = document.createElement("ul");
        ul.className += " pics_widget";

        widgets[i].appendChild(premium);

        widgets[i].appendChild(ul);

        render(order, count, nsfw, ul);

        var classname = document.getElementsByClassName("item_ad");


       /* for (var a = 0; a < classname.length; a++) {

            classname[a].addEventListener('click', onClickFunction, false);

        }*/


    }


return true;
}


////ESTA ES RENDER
function render(order, count, nsfw, div_actual){

    for (i = 0; i < count; i++) {



            var li = document.createElement("li");
            li.className += "item_ad";

            if(size)
              li.style.width = size + "%";

           var div = document.createElement("div");
            div.innerHTML = lista[i].title;

            var a = document.createElement("a");
            a.href =  slugify(lista[i].title);
            a.setAttribute('target', '_blank');
            //a.setAttribute('onclick', 'token_key()');//"'+ reverse(encodeURIComponent(lista[i].url)) +'","' + lista[i].id_tols + '"
            //a.setAttribute('data-tols', lista[i].id_tols);
            a.setAttribute('rel', 'nofollow');
            a.setAttribute('data-alt', lista[i].url);
            a.className = "item_a_"+lista[i].id_tols+" magic-link";
              /*a.target = "_blank";*/

            var figure = document.createElement("figure");
            var image = document.createElement("img");

            image.src = lista[i].image;



            figure.appendChild(image);
            a.appendChild(figure);
            a.appendChild(div);
            li.appendChild(a);

            div_actual.appendChild(li);


        }

        var classname = document.getElementsByClassName("item_ad");

        for (var i = 0; i < classname.length; i++) {
            classname[i].addEventListener('click', function(){
                moveElementToBottom(this);
            }, false);
        }

}



DONDE PONER EL CALLBACK Y COMO LLAMAR TU CODIGO, CON UNA FUNCION?